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<?php

/*=======================================================================

// File:	JPGRAPH_DATE.PHP

// Description:	Classes to handle Date scaling

// Created: 	2005-05-02

// Ver:		$Id: jpgraph_date.php 911 2007-09-26 21:00:09Z ljp $

//

// Copyright (c) Aditus Consulting. All rights reserved.

//========================================================================

*/

DEFINE('HOURADJ_1',0+30);

DEFINE('HOURADJ_2',1+30);

DEFINE('HOURADJ_3',2+30);

DEFINE('HOURADJ_4',3+30);

DEFINE('HOURADJ_6',4+30);

DEFINE('HOURADJ_12',5+30);

DEFINE('MINADJ_1',0+20);

DEFINE('MINADJ_5',1+20);

DEFINE('MINADJ_10',2+20);

DEFINE('MINADJ_15',3+20);

DEFINE('MINADJ_30',4+20);

DEFINE('SECADJ_1',0);

DEFINE('SECADJ_5',1);

DEFINE('SECADJ_10',2);

DEFINE('SECADJ_15',3);

DEFINE('SECADJ_30',4);

DEFINE('YEARADJ_1',0+30);

DEFINE('YEARADJ_2',1+30);

DEFINE('YEARADJ_5',2+30);

DEFINE('MONTHADJ_1',0+20);

DEFINE('MONTHADJ_6',1+20);

DEFINE('DAYADJ_1',0);

DEFINE('DAYADJ_WEEK',1);

DEFINE('DAYADJ_7',1);

DEFINE('SECPERYEAR',31536000);

DEFINE('SECPERDAY',86400);

DEFINE('SECPERHOUR',3600);

DEFINE('SECPERMIN',60);

class DateScale extends LinearScale {

    var $date_format = '';

    var $iStartAlign = false, $iEndAlign = false;

    var $iStartTimeAlign = false, $iEndTimeAlign = false;

//---------------

// CONSTRUCTOR

    function DateScale($aMin=0,$aMax=0,$aType='x') {

	assert($aType=="x");

	assert($aMin<=$aMax);

	$this->type=$aType;

	$this->scale=array($aMin,$aMax);

	$this->world_size=$aMax-$aMin;

	$this->ticks = new LinearTicks();

	$this->intscale=true;

    }

//------------------------------------------------------------------------------------------

// Utility Function AdjDate()

// Description: Will round a given time stamp to an even year, month or day

// argument.

//------------------------------------------------------------------------------------------

    function AdjDate($aTime,$aRound=0,$aYearType=false,$aMonthType=false,$aDayType=false) {

	$y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

	$h=0;$i=0;$s=0;

	if( $aYearType !== false ) {

	    $yearAdj = array(0=>1, 1=>2, 2=>5);

	    if( $aRound == 0 ) {

		$y = floor($y/$yearAdj[$aYearType])*$yearAdj[$aYearType];

	    }

	    else {

		++$y;

		$y = ceil($y/$yearAdj[$aYearType])*$yearAdj[$aYearType];

	    }

	    $m=1;$d=1;

	}

	elseif( $aMonthType !== false ) {

	    $monthAdj = array(0=>1, 1=>6);

	    if( $aRound == 0 ) {

		$m = floor($m/$monthAdj[$aMonthType])*$monthAdj[$aMonthType];

		$d=1;

	    }

	    else {

		++$m;

		$m = ceil($m/$monthAdj[$aMonthType])*$monthAdj[$aMonthType];

		$d=1;

	    }

	}

	elseif( $aDayType !== false ) {

	    if( $aDayType == 0 ) {

		if( $aRound == 1 ) {

		    //++$d;

		    $h=23;$i=59;$s=59;

		}

	    }

	    else {

		// Adjust to an even week boundary.

		$w = (int)date('w',$aTime); // Day of week 0=Sun, 6=Sat

		if( true ) { // Adjust to start on Mon

		    if( $w==0 ) $w=6;

		    else --$w;

		}

		if( $aRound == 0 ) {

		    $d -= $w;

		}

		else {

		    $d += (7-$w);

		    $h=23;$i=59;$s=59;

		}

	    }

	}

	return mktime($h,$i,$s,$m,$d,$y);

    }

//------------------------------------------------------------------------------------------

// Wrapper for AdjDate that will round a timestamp to an even date rounding

// it downwards.

//------------------------------------------------------------------------------------------

    function AdjStartDate($aTime,$aYearType=false,$aMonthType=false,$aDayType=false) {

	return $this->AdjDate($aTime,0,$aYearType,$aMonthType,$aDayType);

    }

//------------------------------------------------------------------------------------------

// Wrapper for AdjDate that will round a timestamp to an even date rounding

// it upwards

//------------------------------------------------------------------------------------------

    function AdjEndDate($aTime,$aYearType=false,$aMonthType=false,$aDayType=false) {

	return $this->AdjDate($aTime,1,$aYearType,$aMonthType,$aDayType);

    }

//------------------------------------------------------------------------------------------

// Utility Function AdjTime()

// Description: Will round a given time stamp to an even time according to

// argument.

//------------------------------------------------------------------------------------------

    function AdjTime($aTime,$aRound=0,$aHourType=false,$aMinType=false,$aSecType=false) {

	$y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

	$h = (int)date('H',$aTime); $i = (int)date('i',$aTime); $s = (int)date('s',$aTime);

	if( $aHourType !== false ) {

	    $aHourType %= 6;

	    $hourAdj = array(0=>1, 1=>2, 2=>3, 3=>4, 4=>6, 5=>12);

	    if( $aRound == 0 )

		$h = floor($h/$hourAdj[$aHourType])*$hourAdj[$aHourType];

	    else {

		if( ($h % $hourAdj[$aHourType]==0) && ($i > 0 || $s > 0) ) {

		    $h++;

		}

		$h = ceil($h/$hourAdj[$aHourType])*$hourAdj[$aHourType];

		if( $h >= 24 ) {

		    $aTime += 86400;

		    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

		    $h -= 24;

		}

	    }

	    $i=0;$s=0;

	}

	elseif( $aMinType !== false ) {

	    $aMinType %= 5;

	    $minAdj = array(0=>1, 1=>5, 2=>10, 3=>15, 4=>30);

	    if( $aRound == 0 ) {

		$i = floor($i/$minAdj[$aMinType])*$minAdj[$aMinType];

	    }

	    else {

		if( ($i % $minAdj[$aMinType]==0) && $s > 0 ) {

		    $i++;

		}

		$i = ceil($i/$minAdj[$aMinType])*$minAdj[$aMinType];

		if( $i >= 60) {

		    $aTime += 3600;

		    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

		    $h = (int)date('H',$aTime); $i = 0;

		}

	    }

	    $s=0;

	}

	elseif( $aSecType !== false ) {

	    $aSecType %= 5;

	    $secAdj = array(0=>1, 1=>5, 2=>10, 3=>15, 4=>30);

	    if( $aRound == 0 ) {

		$s = floor($s/$secAdj[$aSecType])*$secAdj[$aSecType];

	    }

	    else {

		$s = ceil($s/$secAdj[$aSecType]*1.0)*$secAdj[$aSecType];

		if( $s >= 60) {

		    $s=0;

		    $aTime += 60;

		    $y = (int)date('Y',$aTime); $m = (int)date('m',$aTime); $d = (int)date('d',$aTime);

		    $h = (int)date('H',$aTime); $i = (int)date('i',$aTime);

		}

	    }

	}

	return mktime($h,$i,$s,$m,$d,$y);

    }

//------------------------------------------------------------------------------------------

// Wrapper for AdjTime that will round a timestamp to an even time rounding

// it downwards.

// Example: AdjStartTime(mktime(18,27,13,2,22,2005),false,2) => 18:20

//------------------------------------------------------------------------------------------

    function AdjStartTime($aTime,$aHourType=false,$aMinType=false,$aSecType=false) {

	return $this->AdjTime($aTime,0,$aHourType,$aMinType,$aSecType);

    }

//------------------------------------------------------------------------------------------

// Wrapper for AdjTime that will round a timestamp to an even time rounding

// it upwards

// Example: AdjEndTime(mktime(18,27,13,2,22,2005),false,2) => 18:30

//------------------------------------------------------------------------------------------

    function AdjEndTime($aTime,$aHourType=false,$aMinType=false,$aSecType=false) {

	return $this->AdjTime($aTime,1,$aHourType,$aMinType,$aSecType);

    }

//------------------------------------------------------------------------------------------

// DateAutoScale

// Autoscale a date axis given start and end time

// Returns an array ($start,$end,$major,$minor,$format)

//------------------------------------------------------------------------------------------

    function DoDateAutoScale($aStartTime,$aEndTime,$aDensity=0,$aAdjust=true) {

	// Format of array

	// array ( Decision point,  array( array( Major-scale-step-array ),

	//			    array( Minor-scale-step-array ),

	//			    array( 0=date-adjust, 1=time-adjust, adjustment-alignment) )

	//

	$scalePoints =

	    array(

		/* Intervall larger than 10 years */

		SECPERYEAR*10,array(array(SECPERYEAR*5,SECPERYEAR*2),

				    array(SECPERYEAR),

				    array(0,YEARADJ_1, 0,YEARADJ_1) ),

		/* Intervall larger than 2 years */

		SECPERYEAR*2,array(array(SECPERYEAR),array(SECPERYEAR),

				   array(0,YEARADJ_1) ),

		/* Intervall larger than 90 days (approx 3 month) */

		SECPERDAY*90,array(array(SECPERDAY*30,SECPERDAY*14,SECPERDAY*7,SECPERDAY),

				   array(SECPERDAY*5,SECPERDAY*7,SECPERDAY,SECPERDAY),

				   array(0,MONTHADJ_1, 0,DAYADJ_WEEK, 0,DAYADJ_1, 0,DAYADJ_1)),

		/* Intervall larger than 30 days (approx 1 month) */

		SECPERDAY*30,array(array(SECPERDAY*14,SECPERDAY*7,SECPERDAY*2, SECPERDAY),

				   array(SECPERDAY,SECPERDAY,SECPERDAY,SECPERDAY),

				   array(0,DAYADJ_WEEK, 0,DAYADJ_1, 0,DAYADJ_1, 0,DAYADJ_1)),

		/* Intervall larger than 7 days */

		SECPERDAY*7,array(array(SECPERDAY,SECPERHOUR*12,SECPERHOUR*6,SECPERHOUR*2),

				  array(SECPERHOUR*6,SECPERHOUR*3,SECPERHOUR,SECPERHOUR),

				  array(0,DAYADJ_1, 1,HOURADJ_12, 1,HOURADJ_6, 1,HOURADJ_1)),

		/* Intervall larger than 1 day */

		SECPERDAY,array(array(SECPERDAY,SECPERHOUR*12,SECPERHOUR*6,SECPERHOUR*2,SECPERHOUR),

				array(SECPERHOUR*6,SECPERHOUR*2,SECPERHOUR,SECPERHOUR,SECPERHOUR),

				array(1,HOURADJ_12, 1,HOURADJ_6, 1,HOURADJ_1, 1,HOURADJ_1)),

		/* Intervall larger than 12 hours */

		SECPERHOUR*12,array(array(SECPERHOUR*2,SECPERHOUR,SECPERMIN*30,900,600),

				    array(1800,1800,900,300,300),

				    array(1,HOURADJ_1, 1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

		/* Intervall larger than 2 hours */

		SECPERHOUR*2,array(array(SECPERHOUR,SECPERMIN*30,900,600,300),

				   array(1800,900,300,120,60),

				   array(1,HOURADJ_1, 1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

		/* Intervall larger than 1 hours */

		SECPERHOUR,array(array(SECPERMIN*30,900,600,300),array(900,300,120,60),

				 array(1,MINADJ_30, 1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5) ),

		/* Intervall larger than 30 min */

		SECPERMIN*30,array(array(SECPERMIN*15,SECPERMIN*10,SECPERMIN*5,SECPERMIN),

				   array(300,300,60,10),

				   array(1,MINADJ_15, 1,MINADJ_10, 1,MINADJ_5, 1,MINADJ_1)),

		/* Intervall larger than 1 min */

		SECPERMIN,array(array(SECPERMIN,15,10,5),

				array(15,5,2,1),

				array(1,MINADJ_1, 1,SECADJ_15, 1,SECADJ_10, 1,SECADJ_5)),

		/* Intervall larger than 10 sec */

		10,array(array(5,2),

			 array(1,1),

			 array(1,SECADJ_5, 1,SECADJ_1)),

		/* Intervall larger than 1 sec */

		1,array(array(1),

			array(1),

			array(1,SECADJ_1)),

		);

	$ns = count($scalePoints);

	// Establish major and minor scale units for the date scale

	$diff = $aEndTime - $aStartTime;

	if( $diff < 1 ) return false;

	$done=false;

	$i=0;

	while( ! $done ) {

	    if( $diff > $scalePoints[2*$i] ) {

		// Get major and minor scale for this intervall

		$scaleSteps = $scalePoints[2*$i+1];

		$major = $scaleSteps[0][min($aDensity,count($scaleSteps[0])-1)];

		// Try to find out which minor step looks best

		$minor = $scaleSteps[1][min($aDensity,count($scaleSteps[1])-1)];

		if( $aAdjust ) {

		    // Find out how we should align the start and end timestamps

		    $idx = 2*min($aDensity,floor(count($scaleSteps[2])/2)-1);

		    if( $scaleSteps[2][$idx] === 0 ) {

			// Use date adjustment

			$adj = $scaleSteps[2][$idx+1];

			if( $adj >= 30 ) {

			    $start = $this->AdjStartDate($aStartTime,$adj-30);

			    $end   = $this->AdjEndDate($aEndTime,$adj-30);

			}

			elseif( $adj >= 20 ) {

			    $start = $this->AdjStartDate($aStartTime,false,$adj-20);

			    $end   = $this->AdjEndDate($aEndTime,false,$adj-20);

			}

			else {

			    $start = $this->AdjStartDate($aStartTime,false,false,$adj);

			    $end   = $this->AdjEndDate($aEndTime,false,false,$adj);

			    // We add 1 second for date adjustment to make sure we end on 00:00 the following day

			    // This makes the final major tick be srawn when we step day-by-day instead of ending

			    // on xx:59:59 which would not draw the final major tick

			    $end++;

			}

		    }

		    else {

			// Use time adjustment

			$adj = $scaleSteps[2][$idx+1];

			if( $adj >= 30 ) {

			    $start = $this->AdjStartTime($aStartTime,$adj-30);

			    $end   = $this->AdjEndTime($aEndTime,$adj-30);

			}

			elseif( $adj >= 20 ) {

			    $start = $this->AdjStartTime($aStartTime,false,$adj-20);

			    $end   = $this->AdjEndTime($aEndTime,false,$adj-20);

			}

			else {

			    $start = $this->AdjStartTime($aStartTime,false,false,$adj);

			    $end   = $this->AdjEndTime($aEndTime,false,false,$adj);

			}

		    }

		}

		// If the overall date span is larger than 1 day ten we show date

		$format = '';

		if( ($end-$start) > SECPERDAY ) {

		    $format = 'Y-m-d ';

		}

		// If the major step is less than 1 day we need to whow hours + min

		if( $major < SECPERDAY ) {

		    $format .= 'H:i';

		}

		// If the major step is less than 1 min we need to show sec

		if( $major < 60 ) {

		    $format .= ':s';

		}

		$done=true;

	    }

	    ++$i;

	}

	return array($start,$end,$major,$minor,$format);

    }

    // Overrides the automatic determined date format. Must be a valid date() format string

    function SetDateFormat($aFormat) {

	$this->date_format = $aFormat;

	$this->ticks->SetLabelDateFormat($this->date_format);

    }

    function AdjustForDST($aFlg=true) {

	$this->ticks->AdjustForDST($aFlg);

    }

    function SetDateAlign($aStartAlign,$aEndAlign=false) {

	if( $aEndAlign === false ) {

	    $aEndAlign=$aStartAlign;

	}

	$this->iStartAlign = $aStartAlign;

	$this->iEndAlign = $aEndAlign;

    }

    function SetTimeAlign($aStartAlign,$aEndAlign=false) {

	if( $aEndAlign === false ) {

	    $aEndAlign=$aStartAlign;

	}

	$this->iStartTimeAlign = $aStartAlign;

	$this->iEndTimeAlign = $aEndAlign;

    }

    function AutoScale(&$img,$aStartTime,$aEndTime,$aNumSteps) {

	if( $aStartTime == $aEndTime ) {

	    // Special case when we only have one data point.

	    // Create a small artifical intervall to do the autoscaling

	    $aStartTime -= 10;

	    $aEndTime += 10;

	}

	$done=false;

	$i=0;

	while( ! $done && $i < 5) {

	    list($adjstart,$adjend,$maj,$min,$format) = $this->DoDateAutoScale($aStartTime,$aEndTime,$i);

	    $n = floor(($adjend-$adjstart)/$maj);

	    if( $n * 1.7 > $aNumSteps ) {

		$done=true;

	    }

	    $i++;

	}

	/*

	if( 0 ) { // DEBUG

	    echo "    Start =".date("Y-m-d H:i:s",$aStartTime)."<br>";

	    echo "    End   =".date("Y-m-d H:i:s",$aEndTime)."<br>";

	    echo "Adj Start =".date("Y-m-d H:i:s",$adjstart)."<br>";

	    echo "Adj End   =".date("Y-m-d H:i:s",$adjend)."<p>";

	    echo "Major = $maj s, ".floor($maj/60)."min, ".floor($maj/3600)."h, ".floor($maj/86400)."day<br>";

	    echo "Min = $min s, ".floor($min/60)."min, ".floor($min/3600)."h, ".floor($min/86400)."day<br>";

	    echo "Format=$format<p>";

	}

	*/

	if( $this->iStartTimeAlign !== false && $this->iStartAlign !== false ) {

	    JpGraphError::RaiseL(3001);

//('It is only possible to use either SetDateAlign() or SetTimeAlign() but not both');

	}

	if( $this->iStartTimeAlign !== false ) {

	    if( $this->iStartTimeAlign >= 30 ) {

		$adjstart = $this->AdjStartTime($aStartTime,$this->iStartTimeAlign-30);

	    }

	    elseif(  $this->iStartTimeAlign >= 20 ) {

		$adjstart = $this->AdjStartTime($aStartTime,false,$this->iStartTimeAlign-20);

	    }

	    else {

		$adjstart = $this->AdjStartTime($aStartTime,false,false,$this->iStartTimeAlign);

	    }

	}

	if( $this->iEndTimeAlign !== false ) {

	    if( $this->iEndTimeAlign >= 30 ) {

		$adjend = $this->AdjEndTime($aEndTime,$this->iEndTimeAlign-30);

	    }

	    elseif(  $this->iEndTimeAlign >= 20 ) {

		$adjend = $this->AdjEndTime($aEndTime,false,$this->iEndTimeAlign-20);

	    }

	    else {

		$adjend = $this->AdjEndTime($aEndTime,false,false,$this->iEndTimeAlign);

	    }

	}

	if( $this->iStartAlign !== false ) {

	    if( $this->iStartAlign >= 30 ) {

		$adjstart = $this->AdjStartDate($aStartTime,$this->iStartAlign-30);

	    }

	    elseif(  $this->iStartAlign >= 20 ) {

		$adjstart = $this->AdjStartDate($aStartTime,false,$this->iStartAlign-20);

	    }

	    else {

		$adjstart = $this->AdjStartDate($aStartTime,false,false,$this->iStartAlign);

	    }

	}

	if( $this->iEndAlign !== false ) {

	    if( $this->iEndAlign >= 30 ) {

		$adjend = $this->AdjEndDate($aEndTime,$this->iEndAlign-30);

	    }

	    elseif(  $this->iEndAlign >= 20 ) {

		$adjend = $this->AdjEndDate($aEndTime,false,$this->iEndAlign-20);

	    }

	    else {

		$adjend = $this->AdjEndDate($aEndTime,false,false,$this->iEndAlign);

	    }

	}

	$this->Update($img,$adjstart,$adjend);

	if( ! $this->ticks->IsSpecified() )

	    $this->ticks->Set($maj,$min);

	if( $this->date_format == '' )

	    $this->ticks->SetLabelDateFormat($format);

	else

	    $this->ticks->SetLabelDateFormat($this->date_format);

    }

}

?>